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