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