One vertex per element, one color per generator, with an edge from x to x·s.
(5,6)(7,14)(8,12)(9,18)(10,13)(11,17)(15,19)(16,20)(21,22,27,30)(23,31,34,35)(24,33,36,32)(25,28,26,29)(1,2)(3,4)(8,9)(12,18)(14,20)(15,17)(21,23,27,34)(22,24,30,36)(25,33,26,32)(28,31,29,35)(2,4)(5,7)(6,11)(8,17)(9,15)(10,16)(12,20)(13,19)(14,18)(21,24)(22,23)(25,35)(26,31)(27,36)(28,32)(29,33)(30,34) involution — undirected(5,8,10,9)(6,12,13,18)(7,15,16,17)(11,14,19,20)(21,25,27,26)(22,28,30,29)(23,32,34,33)(24,35,36,31)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.