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