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