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