One vertex per element, one color per generator, with an edge from x to x·s.
(5,13)(8,15)(11,14)(12,16)(17,18)(19,28)(20,25)(21,31)(22,29)(23,27)(24,30)(26,32)(33,34)(35,41)(36,45)(37,47)(38,40)(39,42)(43,44)(46,48) involution — undirected(1,2)(3,10)(4,7)(5,8)(6,9)(11,16)(12,14)(13,15)(17,19)(18,24)(20,22)(21,29)(23,30)(25,26)(27,28)(31,32)(33,34,39,42)(35,40,38,41)(36,45,47,37)(43,48,46,44)(1,3,6,7)(2,4,9,10)(5,11,13,14)(8,12,15,16)(17,20,23,31)(18,25,27,21)(19,22,30,32)(24,26,28,29)(33,35,39,38)(34,40,42,41)(36,43,47,46)(37,44,45,48)(1,2)(3,4)(5,8)(6,9)(7,10)(11,12)(13,15)(14,16)(17,21)(18,20)(19,29)(22,24)(23,25)(26,30)(27,31)(28,32)(33,36,39,47)(34,37,42,45)(35,43,38,46)(40,44,41,48)(1,4)(2,7)(3,9)(5,12)(6,10)(8,14)(11,15)(13,16)(17,18)(19,24)(20,25)(21,31)(22,26)(23,27)(28,30)(29,32)(33,37)(34,36)(35,44)(38,48)(39,45)(40,43)(41,46)(42,47) involution — undirected(1,5)(2,8)(3,11)(4,12)(6,13)(7,14)(9,15)(10,16)(17,22,23,32)(18,26,27,29)(19,20,30,31)(21,24,25,28)(33,38,39,35)(34,41,42,40)(36,46,47,43)(37,48,45,44)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.