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