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