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