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