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