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