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