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