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