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