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