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