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