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