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