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