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