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