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