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