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