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