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