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