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)(11,13)(12,14)(15,16)(17,18)(19,26)(20,24)(21,23)(22,25)(27,32)(28,31)(29,30) involution — undirected(1,3,5,2)(4,7,8,6)(9,11)(10,13)(12,15)(14,16)(17,19,22,21)(18,23,25,26)(20,27,28,29)(24,30,31,32)(1,4,5,8)(2,6,3,7)(10,14)(11,15)(17,20,22,28)(18,24,25,31)(19,27,21,29)(23,30,26,32)(2,3)(6,7)(11,15)(13,16)(18,25)(20,28)(23,26)(27,29) involution — undirected(18,25)(23,26)(24,31)(30,32) involution — undirected(17,21,22,19)(18,23,25,26)(20,29,28,27)(24,30,31,32)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.