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)(11,15)(12,14)(13,16)(17,18,23,29)(19,31,20,25)(21,36,39,46)(22,30,24,28)(26,34,42,33)(27,40,45,38)(32,43,35,44)(37,41,48,47)(2,5)(6,8)(9,11)(10,13)(12,16)(14,15)(17,19)(18,25)(20,23)(21,37)(22,33)(24,34)(26,28)(27,43)(29,31)(30,42)(32,40)(35,38)(36,47)(39,48)(41,46)(44,45) involution — undirected(10,14)(11,16)(17,20,24,34,23,19,22,33)(18,26,30,31,29,42,28,25)(21,32,40,37,39,35,38,48)(27,44,46,41,45,43,36,47)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(17,21,24,40,23,39,22,38)(18,27,30,46,29,45,28,36)(19,32,33,37,20,35,34,48)(25,41,26,43,31,47,42,44)(2,5)(6,8)(10,14)(13,15)(17,22,23,24)(18,28,29,30)(19,33,20,34)(21,38,39,40)(25,26,31,42)(27,36,45,46)(32,37,35,48)(41,43,47,44)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.