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