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)(11,13)(12,14)(15,16)(17,18,21,25)(19,27,29,23)(20,31,32,40)(22,35,34,26)(24,36,39,33)(28,43,44,48)(30,38,46,42)(37,45,41,47)(2,5)(6,8)(9,11)(10,13)(12,15)(14,16)(17,19)(18,23)(20,28)(21,29)(22,30)(24,37)(25,27)(26,38)(31,48)(32,44)(33,45)(34,46)(35,42)(36,47)(39,41)(40,43) involution — undirected(11,15)(13,16)(17,20)(18,24)(19,28)(21,32)(22,36)(23,37)(25,39)(26,40)(27,41)(29,44)(30,47)(31,35)(33,34)(38,43)(42,48)(45,46) involution — undirected(11,15)(13,16)(20,32)(24,39)(28,44)(31,40)(33,36)(37,41)(43,48)(45,47) involution — undirected(1,3,4,7)(2,6,5,8)(10,14)(13,16)(19,29)(20,32)(23,27)(24,39)(30,46)(31,40)(33,36)(38,42)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.