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