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