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