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