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