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