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