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