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