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