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