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