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