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