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