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