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