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)(35,42)(38,40)(43,48)(45,47) involution — undirected(2,7)(5,8)(9,15)(13,16)(17,18)(19,22)(20,28)(21,24)(23,29)(25,27)(26,31)(30,32)(33,34,39,36)(35,40,42,38)(37,44,46,41)(43,45,48,47)(1,3,6,11)(2,5,7,8)(4,12,14,10)(9,16,15,13)(17,18,21,24)(19,25,27,22)(20,23,29,28)(26,31,32,30)(33,35,39,42)(34,40,36,38)(37,43,46,48)(41,47,44,45)(1,3)(2,8)(4,10)(5,7)(6,11)(9,16)(12,14)(13,15)(17,19,21,27)(18,22,24,25)(20,26,29,32)(23,30,28,31)(33,36,39,34)(35,38,42,40)(37,44,46,41)(43,45,48,47)(1,4,6,14)(2,9,7,15)(3,10,11,12)(5,13,8,16)(17,18)(19,22)(20,23)(21,24)(25,27)(26,30)(28,29)(31,32)(33,37,39,46)(34,41,36,44)(35,43,42,48)(38,45,40,47)(1,5,6,8)(2,3,7,11)(4,13,14,16)(9,10,15,12)(17,20,21,29)(18,23,24,28)(19,26,27,32)(22,30,25,31)(33,38)(34,35)(36,42)(37,45)(39,40)(41,43)(44,48)(46,47)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.