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