One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,9)(3,10,11,7)(4,6,13,8)(12,15,16,14)(17,18,22,26)(19,27,28,45)(20,31,32,48)(21,36,34,25)(23,38,39,29)(24,41,42,35)(30,43,37,46)(33,40,47,44)(2,6)(3,11)(4,13)(7,15)(8,9)(10,14)(20,32)(24,42)(27,45)(29,38)(31,48)(33,47)(35,41)(43,46) involution — undirected(1,3,4,12,5,11,13,16)(2,7,8,15,9,10,6,14)(17,19,21,37,22,28,34,30)(18,23,25,44,26,39,36,40)(20,33,35,38,32,47,41,29)(24,43,31,45,42,46,48,27)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.