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