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