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