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