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)(17,18,23,38,22,28,21,27)(19,29,31,24,33,25,32,41)(20,26,39,48,37,45,36,44)(30,43,46,40,35,42,34,47)(1,3)(2,5)(4,8)(6,7)(10,13)(11,15)(17,19)(18,24)(20,34)(21,31)(22,33)(23,32)(25,27)(26,43)(28,41)(29,38)(30,36)(35,39)(37,46)(40,44)(42,45)(47,48) involution — undirected(2,6)(5,7)(9,10)(11,14)(12,13)(15,16)(17,19)(18,25)(20,35)(21,32)(22,33)(23,31)(24,27)(26,43)(28,29)(30,37)(34,39)(36,46)(38,41)(40,48)(42,45)(44,47) involution — undirected(3,8)(5,7)(10,13)(14,16)(17,20,23,39,22,37,21,36)(18,26,38,48,28,45,27,44)(19,30,31,46,33,35,32,34)(24,40,25,42,41,47,29,43)(9,11,12,15)(10,14,13,16)(17,21,22,23)(18,27,28,38)(19,31,33,32)(20,36,37,39)(24,25,41,29)(26,44,45,48)(30,46,35,34)(40,42,47,43)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.