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