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)(15,17)(16,19)(21,22,26,27)(23,24,29,28)(25,30,33,34)(31,32,36,35)(13,14)(15,16)(17,19)(18,20)(22,27)(23,29)(25,33)(32,35) involution — undirected(6,7)(10,11)(13,15,18,17)(14,19,20,16)(21,23,26,29)(22,28,27,24)(25,31,33,36)(30,35,34,32)(1,2)(3,4)(5,7,9,6)(8,11,12,10)(13,16,18,19)(14,15,20,17)(21,24,26,28)(22,29,27,23)(25,32,33,35)(30,36,34,31)(5,8,9,12)(6,10,7,11)(13,17,18,15)(14,19,20,16)(21,25)(22,30)(23,31)(24,32)(26,33)(27,34)(28,35)(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.