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