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