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