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