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