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