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