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