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