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