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