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