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