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