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