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