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