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