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