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