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