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