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