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