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