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