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)(17,18,23,26)(19,22,25,20)(21,29,30,24)(27,28,32,31)(1,3,5,7)(2,4,8,6)(9,11,12,15)(10,13,14,16)(17,19,23,25)(18,20,26,22)(21,27,30,32)(24,28,29,31)(1,3)(2,6)(4,8)(5,7)(9,10)(11,13)(12,14)(15,16)(17,20,23,22)(18,19,26,25)(21,28,30,31)(24,27,29,32)(1,3)(2,4)(5,7)(6,8)(9,11)(10,13)(12,15)(14,16)(17,21)(18,24)(19,27)(20,28)(22,31)(23,30)(25,32)(26,29) involution — undirected(9,10)(11,13)(12,14)(15,16)(17,18)(19,20)(21,24)(22,25)(23,26)(27,28)(29,30)(31,32) involution — undirected(1,4)(2,7)(3,8)(5,6)(17,22,23,20)(18,25,26,19)(21,28,30,31)(24,27,29,32)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.