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