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