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