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