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