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