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