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