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)(11,15)(12,14)(13,16)(17,18)(19,22)(20,27)(21,24)(23,28)(25,29)(26,32)(30,31)(1,3)(2,6)(4,7)(5,8)(9,10,12,14)(11,13,16,15)(19,25)(22,29)(26,31)(30,32)(1,2)(3,4)(5,7)(6,8)(9,10)(11,13)(12,14)(15,16)(17,18,21,24)(19,22,25,29)(20,23,28,27)(26,30,31,32)(1,3)(2,6)(4,7)(5,8)(9,11)(10,13)(12,16)(14,15)(17,18)(19,22)(20,23)(21,24)(25,29)(26,30)(27,28)(31,32) involution — undirected(1,4,5,6)(2,3,7,8)(17,19)(18,22)(20,26)(21,25)(23,30)(24,29)(27,32)(28,31)(1,3)(2,4)(5,8)(6,7)(17,20)(18,23)(19,26)(21,28)(22,30)(24,27)(25,31)(29,32) 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.