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