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