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