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)(19,24)(20,29)(21,28)(22,26)(23,25)(27,32)(30,31)(1,3)(2,5)(4,7)(6,8)(9,10)(11,13)(12,14)(15,16)(17,18,23,28,22,26,21,25)(19,24,31,20,27,32,29,30)(2,6)(3,7)(9,11,12,15)(10,13,14,16)(17,19,22,27)(18,24,26,32)(20,25,30,28)(21,29,23,31)(2,6)(5,8)(10,14)(13,16)(19,27)(20,30)(24,32)(29,31) involution — undirected(17,20,23,32,22,30,21,24)(18,19,28,31,26,27,25,29)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.