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