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)(11,14)(12,15)(13,16)(17,18,23,27)(19,28,32,45)(20,33,35,25)(21,26,22,38)(24,30,40,31)(29,46,34,44)(36,43,37,42)(39,47,41,48)(9,11)(10,13)(12,16)(14,15)(17,19,22,31,23,32,21,30)(18,24,26,28,27,40,38,45)(20,34,36,48,35,29,37,47)(25,41,43,46,33,39,42,44)(2,5)(6,8)(11,16)(13,14)(17,20)(18,25)(19,29)(21,37)(22,36)(23,35)(24,39)(26,43)(27,33)(28,44)(30,48)(31,47)(32,34)(38,42)(40,41)(45,46) involution — undirected(1,3,4,7)(2,6,5,8)(9,11)(10,14)(12,16)(13,15)(20,35)(25,33)(29,34)(36,37)(39,41)(42,43)(44,46)(47,48)(11,16)(13,14)(17,21,23,22)(18,26,27,38)(19,30,32,31)(20,36,35,37)(24,28,40,45)(25,42,33,43)(29,47,34,48)(39,46,41,44)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.