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