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