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