One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,7)(6,8)(9,10,13,12)(11,15,16,14)(17,18,22,25)(19,20,27,23)(21,24,31,32)(26,28,29,30)(1,3)(2,5)(4,8)(6,7)(9,11,13,16)(10,14,12,15)(17,19)(18,23)(20,25)(21,29)(22,27)(24,28)(26,31)(30,32)(1,2)(3,6)(4,7)(5,8)(17,19,22,27)(18,23,25,20)(21,26,31,29)(24,30,32,28)(1,3)(2,6)(4,8)(5,7)(17,19)(18,23)(20,25)(21,26)(22,27)(24,30)(28,32)(29,31) involution — undirected(1,3)(2,5)(4,8)(6,7)(17,20,22,23)(18,19,25,27)(21,30,31,28)(24,29,32,26)(1,2)(3,6)(4,7)(5,8)(9,12,13,10)(11,15,16,14)(17,21,22,31)(18,24,25,32)(19,26,27,29)(20,28,23,30)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.