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