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