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