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