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