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