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