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