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