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