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