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