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