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