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