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