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