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