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