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