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