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