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