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