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