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