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