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