One vertex per element, one color per generator, with an edge from x to x·s.
(2,7)(3,9)(5,13)(12,16)(17,18)(19,20)(21,24)(22,29)(23,25)(26,31)(27,32)(28,30)(37,45)(39,46)(42,48)(44,47) involution — undirected(1,2)(3,4)(5,8)(6,7)(9,11)(10,12)(13,14)(15,16)(17,19,24,23)(18,25,21,20)(22,27,31,30)(26,32,29,28)(33,34,38,40)(35,41,43,36)(37,39,45,46)(42,47,48,44)(3,9)(4,11)(10,15)(12,16)(17,20)(18,23)(19,21)(22,28)(24,25)(26,30)(27,29)(31,32)(33,35,38,43)(34,36,40,41)(37,42,45,48)(39,44,46,47)(1,3)(2,4)(5,10)(6,9)(7,11)(8,12)(13,15)(14,16)(17,21,24,18)(19,25,23,20)(22,29,31,26)(27,32,30,28)(33,36)(34,35)(37,44)(38,41)(39,42)(40,43)(45,47)(46,48)(1,4)(2,3)(5,12)(6,11)(7,9)(8,10)(13,16)(14,15)(17,22)(18,26)(19,27)(20,28)(21,29)(23,30)(24,31)(25,32)(33,36)(34,35)(37,44)(38,41)(39,42)(40,43)(45,47)(46,48) involution — undirected(1,5,6,13)(2,8,7,14)(3,10,9,15)(4,12,11,16)(17,23,24,19)(18,25,21,20)(22,30,31,27)(26,32,29,28)(33,37)(34,39)(35,42)(36,44)(38,45)(40,46)(41,47)(43,48)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.