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