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