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