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