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