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)(35,37)(36,44)(38,39)(40,42)(41,46)(43,47)(45,48) involution — undirected(2,7)(4,8)(9,13)(12,15)(18,20)(23,25)(24,28)(30,31)(34,39)(35,42)(41,44)(43,48) involution — undirected(17,18,22,20)(19,23,27,25)(21,24,29,28)(26,30,32,31)(33,34,38,39)(35,40,42,37)(36,41,46,44)(43,47,48,45)(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)(33,35)(34,40)(36,43)(37,39)(38,42)(41,47)(44,45)(46,48)(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)(33,36,38,46)(34,41,39,44)(35,43,42,48)(37,45,40,47)(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)(33,37,38,40)(34,35,39,42)(36,45,46,47)(41,43,44,48)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.