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