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