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