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)(11,13)(12,14)(15,16)(17,18,23,28,22,27,24,29)(19,21,25,31,26,20,30,32)(1,3,5,8)(2,6,4,7)(9,11,12,15)(10,13,14,16)(17,19,22,26)(18,21,27,20)(23,25,24,30)(28,31,29,32)(1,4,5,2)(3,7,8,6)(10,14)(13,16)(17,20)(18,25)(19,29)(21,22)(23,32)(24,31)(26,28)(27,30)(3,8)(6,7)(17,21)(18,26)(19,27)(20,22)(23,32)(24,31)(25,28)(29,30) 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.