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