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