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