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