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