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