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