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