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