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