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