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