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