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